DESCRIPTION OF BUSINESS	12 Months Ended
DESCRIPTION OF BUSINESS	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS	DESCRIPTION OF BUSINESS Acacia Research Corporation (the “Company,” “we,” “us,” or "our") is a permanent capital platform that purchases businesses based on the differentials between public and private market valuations. We use a wide range of transactional and operational capabilities to realize the intrinsic value in the businesses that we acquire. Our ideal transactions include the acquisition of public or private companies, the acquisition of divisions of other companies, or structured transactions that can result in the recapitalization or restructuring of the ownership of a business to enhance value. Our focus to date has been on companies with market values in the sub-$2 billion range and particularly on businesses valued at $1 billion or less. We are, however, opportunistic, and may pursue acquisitions that are larger under the right circumstance. We operate our business based on three key principles of People, Process and Performance and have built a management team with demonstrated expertise in Research, Transactions and Execution, and Operations and Management of our targeted acquisitions. We utilized these skill sets and resources to acquire a portfolio of equity securities of public and private life science businesses, or the “Life Sciences Portfolio,” in June 2020. As of December 31, 2021, we have monetized a portion of the portfolio while retaining an interest in a number of operating businesses, including a controlling interest in one of the companies in the portfolio. Further, some of the businesses in which we continue to hold an interest generate revenues through the receipt of royalties. Intellectual Property Operations – Patent Licensing, Enforcement and Technologies Business Acacia invests in intellectual property and related absolute return assets and engages in the licensing and enforcement of patented technologies. Through our Patent Licensing, Enforcement and Technologies Business we are a principal in the licensing and enforcement of patent portfolios, with our operating subsidiaries obtaining the rights in the patent portfolio or purchasing the patent portfolio outright. We assume all responsibility for advancing operational expenses while pursuing a patent licensing and enforcement program, and when applicable, share net licensing revenue with our patent partners as that program matures, on a pre-arranged and negotiated basis. We may also provide upfront capital to patent owners as an advance against future licensing revenue. Currently, on a consolidated basis, our operating subsidiaries own or control the rights to multiple patent portfolios, which include U.S. patents and certain foreign counterparts, covering technologies used in a variety of industries. We generate revenues and related cash flows from the granting of IP rights for the use of patented technologies that our operating subsidiaries control or own. Our Intellectual Property Operations business depends upon the identification and investment in new patents, inventions and companies that own IP through our relationships with inventors, universities, research institutions, technology companies and others. If Acacia’s operating subsidiaries are unable to maintain those relationships and identify and grow new relationships, then they may not be able to identify new technology-based opportunities for sustainable revenue and/or revenue growth. During the year ended December 31, 2021, Acacia obtained control of one new patent portfolio. During 2020, Acacia obtained control of five new patent portfolios. Industrial Operations Acquisition On October 7, 2021, we consummated our first operating company acquisition of Printronix Holding Corporation and subsidiaries (“Printronix”). Printronix is a leading manufacturer and distributor of industrial impact printers, also known as line matrix printers, and related consumables and services. The Printronix business serves a diverse group of customers that operate across healthcare, food and beverage, manufacturing and logistics, and other sectors. This mature technology is known for its ability to operate in hazardous environments. Printronix has a manufacturing site located in Malaysia and third-party configuration sites located in the United States, Singapore and Holland, along with sales and support locations around the world to support its global network of users, channel partners and strategic alliances. This acquisition was made at what we believe to be an attractive purchase price, and we are now supporting existing management in its execution of strategic partnerships to generate growth. We acquired all of the outstanding stock of Printronix, for a cash purchase price of approximately $37.0 million, which included an initial $33.0 million cash payment and a $4.0 million working capital adjustment. The Company's consolidated financial statements include Printronix's consolidated operations from October 7, 2021 through December 31, 2021. Refer to Note 3 for additional information. COVID-19 Pandemic The full impact of the COVID-19 pandemic continues to evolve as of the date of this report. While the Company does not expect the current situation to present direct risks to its business, and it has not had a material impact to date, the COVID-19 pandemic could adversely impact the Company’s operations, as well as the operations of its licensees and other business partners. Our cash is held in major financial institutions primarily in government instruments. Our business is fully able to operate in a socially distanced and/or remote capacity and in accordance with applicable laws, policies and best practices. Our workforce is provided ample paid sick leave, and we have in place robust disaster recovery and business continuity policies that have been revised to account for a long-term remote work contingency such as this. However, the ongoing pandemic may present risks that we do not currently consider material or risks that may evolve quickly that could have a materially adverse effect on our business, results of operations and financial condition.